To provide an apparatus for moving through a pipe line that has a simple structure and is readily assembled.

The apparatus A for moving through a pipe line includes: a support unit 1 having a supporting part 10 pressed against an inner wall of a pipe; a driving unit 2 having a driving part 50; a transmission member 3 for transmitting the driving force of the driving part to the supporting part; a detection unit 4 having a detection device 70 for detecting a state of transmission of the driving force of the transmission member and covering a part of the transmission member therewith; and a control device 5 for determining a state of support by the supporting part from a detection signal of the detection device.